FC-R9200 Dura Ace 12 speed inner chainring, 40T-NJ for 54/40T Baselayer Dual reflectors provide extra visibility

Dual reflectors provide extra visibility

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Sealed mechanism: Yes

FC-R9200 Dura Ace 12 speed inner chainring, 40T-NJ for 54/40T Baselayer Dual reflectors provide extra visibilityThe Shimano Dura Ace FC R9200 12 speed chainrings are the perfect replacement for worn or damaged chainrings Shimano's class leading chainrings offer the optimum balance of light weight and rigidity for precise shifts even under high load The teeth have been developed to work only in conjunction with 12 speed chains for improved contact providing more efficiency and improved power transfer Genuine Shimano replacement chainrings for the FC R9200 & FC